The use of polyethylene powder to produce dust filters

This project arose from the requirements of an industrial organisation, Dust Control Equipment Limited (D.C.E.) for an investigation into the process mechanism used by them to produce a sintered filter product. The filter product consisted of a core obtained by sintering two grades of polyethylene 60% ultra-high molecular weight (412) and 40% medium molecular weight (5010 - ground) into a corrugated form with a pore size of about 100 microns. The core was then coated with a polytetrafluoroethylene (PTFE) based emulsion to create a permeable non - stick membrane a few microns thick with an average pore size of about 4 microns. The process had been licensed by D.C.E. from a German company Herding GmbH. [Continues.]